◎ Chapter 18 Moonlight Bomb

The moment the bomb exploded, the four members of the special task force and the bomb disposal experts all thought: Oops, this little life is gone.

The fire flickered, smoke rose everywhere, and the bomb exploded, but with little power, it slammed like a cannonball. With the exception of the bomb disposal specialist's hand wounded, no Chéng Rén was killed. Rao was like this, and the four members of the special case team were still shocked into a cold sweat. The police on the periphery rushed in and hurriedly carried the injured and screaming bomb disposal experts onto the stretcher.

There was a false alarm, confetti flew in the air, and a smell of sulfur filled the air.

The dragon said: What's the matter, what is this?

Prof. Leung: This should be a warning from the murderer!

Police Chief: There should be a thorough inspection of the dormitories and laboratories of the ammunition engineering students.

Bao Slash: The IQ of the person who can make a bomb is not low enough for us to discover the explosives he hid under the bed.

Su Mei: I'm scared to death, what are we going to do next?

Prof. Leung: Picking up garbage.

The task force sprang into action at the scene of the explosion to find all the pieces of the bomb and then piece them together to find clues left by the killer. If there are no witnesses or surveillance footage of an explosion, it is very difficult to detect. Because after the explosion, the evidence will be destroyed with the explosion, and the rescue measures of the fire brigade and medical personnel will also destroy the scene.

After the on-site investigation was completed, Su Mei recreated the entire explosion process with computer animation, and a lecturer in ammunition engineering described in detail the technology used to make the moonlight bomb. Moonlight bombs must be made at night, and the tools used are very simple, using an ordinary thermometer as a detonating device, after the bomb is placed, the mercury rises with the temperature of the surrounding environment, and the sun gradually reaches the detonation point after the sun comes out. The killer did not place many explosives, which is why the bomb was not very powerful. Professor Leung believes that this was done deliberately by the murderer, and the purpose was not to kill people but to deter the police.

The bomb was a warning that the killer told the task force that he could kill them and hoped that the police would retreat.

Su Mei said: The next explosion, it is estimated that it will be escalated.

Hualong said: Obviously, we have to go hard, and we will not back down, who called us a special case team.

The explosives were placed in a cardboard box, which was a sanitary napkin box. Bao Chu picked up a piece of cardboard box with tweezers, sniffed it closely, he raised his face, closed his eyes and said: In addition to the smell of gunpowder smoke and sulfur, there is also a fragrance.

Professor Liang said: Xiaobao, it's not that I don't believe your nose, but this carton is very important to us, and we will immediately carry out separation tests and gunpowder reaction experiments.

Smoke reaction is a type of identification of explosive or shooting residues made by the police during the detection process.

In the "4.22" robbery of a cash truck in Hong Kong, the police confirmed that there was shooting residue on the sleeve of a piece of clothing through gunpowder reaction, so as to find the owner of the clothes, that is, the real culprit of the robbery. In the case of the assassination of President Kennedy in the United States, a bullet with the serial number C2788 became physical evidence. In addition to fingerprints, gunpowder residue is also a key piece of evidence to locate the murderer.

Bao Chop first sprayed some organic solvents on the filter paper, such as ethanol, acetone, carbon tetrachloride, etc., and then covered the filter paper on the carton fragments for extraction, and then separated out gunpowder particles, metal powder, combustion products, and the rest is the residue on the hands, as long as the murderer touches the carton, the police can find out the clues through scientific and technological means.

The physical test method is used, and the advantage of this test is that the physical evidence is not destroyed.

However, Bao Shu tried atomic absorption spectroscopy and fluorescence analysis one after another, but he did not find the residue on his hands on the fragments of the cardboard box, but he was sure that he smelled the fragrance, which should be left by the murderer.

Bao Chop used an electron microscope to observe, and found no traces of cosmetics, this result made him disappointed and puzzled, where did the fragrance come from?

On his last attempt, he used a medium molecule activation analysis to confirm that the fragrance originated from a perfume.

Su Mei said: Could it be that it was a woman who made and planted the bomb?

Prof. Leung: In short, the person who planted the bomb had perfume on his hand, whether it was a man or a woman, and when the murderer put down the cardboard box, the perfume on his hand remained on the cardboard box. In this world, as long as you commit a crime, you will leave a trace. In the whole world, the position of matter is always changing, and there are traces of the astral explosion hundreds of millions of years ago, not to mention the bomb we witnessed.

Su Mei said: This carton is also a bit perverted, who will buy a box of sanitary napkins?

Hua Long said: There is also the source of explosives, which are the focus of our next investigation.

Although there is only such a little evidence, there is a glimmer of light in the case, and everyone vaguely feels that the murderer may be a woman.

Professor Liang arranged the work, and everyone took action non-stop. The police conducted a lot of investigation work in the hope of finding witnesses, and the police visited the dormitory directors of each dormitory to investigate who had seen the cardboard box and the person holding the cardboard box on the night of the moonlight bomb incident. Professor Liang specially asked the person in charge of the police to pay attention to finding the source of the perfume, and the dormitory of the school flower and the dormitory of the old goose were the key targets of investigation, and perfume was found in both dormitories. The boss of the dormitory was also under the suspicion of the police, and he left the dormitory on the night of the crime, and he claimed to the police that he had spent the night playing Warcraft in an Internet café outside the school.

Professor Liang asked Su Mei to verify the words of the dormitory boss, and at the same time asked Bao to analyze and compare the perfumes from the two dormitories with the perfumes on the bomb cartons. Identification knots

If it takes time, under certain conditions, the fragrance of high-end perfumes should be maintained for no less than 70 hours, and the fragrance of floral types should be maintained for no less than 60 hours. It won't be long before this clue obtained by the police will disappear into thin air.

The investigators who secretly monitored the old goose reported that on the night of the explosion, the old goose had been sleeping in the dormitory, and the next morning, this guy, who had always been lazy and unkempt, did a lot of things, he got a haircut, got a new hairstyle, sprayed the dormitory boss's perfume, changed into new clothes, and took a shower for the first time. The classmates reported that the old goose did not have the habit of bathing, and the reason for the old goose was to maintain the original taste and man's true colors.

In addition to these details of life, there is one thing that is very strange, the investigator said that the old goose bought a lot of candles, dozens of them, and did not know what to do with them.

The special task force asked the investigators to be vigilant and continue to keep watch, and it is very likely that the candles were used to make bombs.

In the evening, these candles come in handy.

The old goose used dozens of candles to put a heart pattern under the dormitory building of the school flower, and many students stopped to devour the onlookers, many windows in the girls' dormitory building were opened, and some curious girls poked their heads out to see the excitement. The investigators reported to the special case team, and the four members of the special case team immediately arrived, and Professor Liang asked Hualong to prepare a net gun and arrest the old goose immediately if he had extreme behavior.

The old goose looked open-minded, he pointed to the four members of the special case team and said: Look, the strips are here, cheer for me.

The onlookers laughed, and the four members of the special case team were expressionless, watching what the old goose would do next.

The old goose lit a candle with a lighter, and in the night, a heart burned.

This romantic courtship is not uncommon on campus, and college students are very creative in order to express their love.

The old goose put his hand to his mouth and shouted the name of the school flower, but the window of the school flower's dormitory was never opened. He shouted tired, squatted on the ground, and began to shout "I love you" one after another, and when he shouted, his body still stood up, which looked very funny.

Everyone began to coax, and some girls took out their mobile phones to take pictures of the old goose.

The old goose shouted loudly: I love you.

The school girl was so annoyed that she pushed open the window and said: I'm annoyed.

The old goose said, "Come down, please, you see, so many people are waiting for you."

The school flower said: If you have the ability, you strip naked, run naked, and I'll go down.

The onlookers burst into laughter and began to applaud. The old goose stood up sharply, took off his coat, and threw it on the ground. He gritted his teeth and said: Take it off, run naked, run naked, for love, I fight.

The applause around was even more enthusiastic, and the students present encouraged the old goose to run naked.

Su Mei said to Hualong and Bao Shu: I really miss my college days, why didn't anyone run naked for me at that time.

The dragon said: Yes, or you would have been married a long time ago.

Bao Chu said: The old goose is very courageous, this kind of thing, I can't do it if I kill it.

The old goose undressed one by one, and in the end only a pair of underwear remained, and the underwear was bulging, and it seemed that this perverted guy had another sanitary napkin today. The weather was very cold, and the old goose was so cold that he hugged his arms and shivered. He said to himself, run, run and run without getting cold. The old goose began to run naked, and everyone applauded and cheered him on, and he ran around the schoolyard, and when he stopped panting, his shoe fell off and a white thing was thrown out of his shoe.

The old goose put on his shoes, and a classmate looked down and said with a wicked smile: "Old goose, your sanitary napkin has fallen off."

Hualong said: I ×, the grandson of the old goose actually used a sanitary napkin as an insoles.

The old goose clenched his mouth and began to shout the name of the school flower hoarsely: I love you, I ran naked, I am not cold, I am hot.

In the midst of the girl's screams, the school flower appeared. She went downstairs and walked to the old goose, who was so moved that he was about to cry, and he opened his arms and waited for the school flower to pounce on him. The romantic scene from a Korean drama or romantic drama appears in Lao Gee's mind, where lovers hug each other and a heart made of a candle burns.

The school flower didn't hug the old goose, she frowned and smiled and stretched out her hand, the old goose was stunned for a moment, and then held the school flower's hand.

The old goose said excitedly: I love you, for you, I am willing to do anything, marry me.

The school flower said with a straight face: Love, how much is it worth?

The old goose said: Priceless.

The school girl scoffed, pulled out her hand and said: Bullshit, see this real world clearly, without money, it is difficult to move an inch. Love in college is just a game and a dream, break up as soon as you graduate, wake up. Instead of laughing on the back seat of your bike, I can sit in a BMW and cry. When, when you are on the Hurun rich list, I will be able to fall in love with you, I only love rich people. These candles, cheap gadgets just want to impress me, ridiculous, you don't even have a diamond ring, you dare to propose to me, you really insult me, when did you use a BMW to put a heart pattern?

The school flower kicked down a few candles and left coldly, leaving the old goose staring blankly at her back.

The old goose returned to the dormitory and slept with his head covered. The investigator reported that the old goose had been depressed and decadent for a few days, and it seemed that the school girl's words hit him hard, but the guy quickly picked himself up again and tried to get a scholarship.

He sighed and said to the dormitory boss: It's also my fault, don't blame people for refusing, I don't even have a ring.

The dormitory boss said: Brother, you can't afford a diamond ring, so it's better to buy a bottle of aphrodisiac potion and invite her to put it in when she eats. You can invite me to eat spicy fish in the evening, and I can invite the school flower to the banquet together.

Old Goose: Spicy fish, I will make it myself, let's make it in the dormitory, the key to this dish is that the oil should be hot.

Dormitory Boss: Understood, fry shredded green onions, ginger slices, and fried hot sauce.

Old goose: When stir-frying, the action should be fast, brush and brush, and the lightning will not be able to cover your ears.

Dormitory Boss: Do you want to put some vinegar, it tastes better.

Old Goose: No, what kind of taste, in the end, it's not MSG.

Dorm Boss: Are you done? I didn't bring any paper.

Old Goose: My God! I didn't bring any paper with me, but I do have two sanitary napkins here.

The task force has learned that many students are vying for scholarships. According to the female principal, the scholarship is used to motivate students to develop in an all-round way, create a positive academic atmosphere, and reward and subsidize students with excellent character and academic performance. Currently, the scholarship for students of Ammunition Engineering and Explosive Technology is being reviewed.

The special case team decided to use the scholarship as a disguised reward to fish the murderer out of the water.

The lecturer said: Many students are limited to theory, including me, a lecturer, and they lack practice. I think there are many students who can make moonshine bombs or sanitary napkin bombs, but there are probably only a few people who can make both bombs. Using scholarships as bait, students who can make moonshine bombs and sanitary napkin bombs are most likely murderers.

Hualong: I think the key point in this sanitary napkin case is not in sanitary napkins......

Su Mei: Can you not say it so obscenely, this is a bombing case.

Bao said: The source of explosives is very important.

The headmistress and lecturer told the task force that there was only a small amount of explosives in the school, which was used for scientific research and experiments, and was stored in the laboratory on the second basement floor. The special case team inspected the laboratory, the underground building is in the form of a straight type, consisting of an approach road, a main room, a secondary room and an exhaust outlet, and each underground laboratory has two entrances and exits, and the doors are open outward.

There are two blasting-related laboratories in the school, one is the Explosion Science and Technology Laboratory and the other is the Mechatronic Engineering and Control Laboratory. In addition, there is a selenium mountain test area outside the school, where explosion-related experiments are usually conducted. The Selenium Mountain test area has two hydrogen cannons, an underwater explosion test chamber and various explosion test equipment.

At the press conference on the case, the special case team analyzed that the murderer should be a student majoring in ammunition engineering and explosive technology, and that he may have stolen some explosives during the experiment, and the bomb may have been made in the laboratory. The killer had a habit of spraying perfume, and with the toilet napkin box, the killer could have been a woman, able to enter and leave the laboratory and the dormitory of the deceased counselor.

Bao Chu noticed that the female principal also sprayed perfume, and secretly investigated and learned that the female principal and the deceased counselor had a conflict over issues such as school spirit management standards, and the counselor had privately said that the principal was suspected of taking bribes, but Bao Chu did not find any evidence of bribery.

The headmistress is highly respected, honest and selfless, and has a good reputation in the school. She was unmarried for life because she was taking care of her cousin, who suffered from amnesia.

The university promised students of ammunition engineering and explosive technology that scholarships would be awarded to anyone who could make sanitary napkin bombs and moonshine bombs, even if it was limited to a workable theory.

The police sometimes tempted the murderer in the course of detection. For example, in the tragedy of the destruction of the door in Weizhou, the police offered a reward for the arrest, and a whistleblower said that the deceased was strangled to death by a wire. The details of this crime are known only to the police and the murderer, so the informant is identified as the murderer.

A few days later, the police screened out four suspects based on the theoretical reports submitted by the students: the old goose, the school flower, the dormitory boss, and a disabled girl.

The theoretical presentations of these four students were all feasible, and according to their professional theories, they were all able to make sanitary napkin bombs and moonshine bombs.

The school flower wrote in the paper: spontaneous combustion of sanitary napkins is actually very simple, there are many substances that burn in water, such as potassium, calcium, rubidium, cesium, aluminum iodine powder is placed in the sanitary napkin, and then combined with an accelerant, the blood contains water, when a person has menstruation, the sanitary napkin will burn. If it is further upgraded, it can detonate a bomb hidden in a sanitary napkin by burning it.

The reports of the old goose and the dormitory boss are exactly the same, and the police suspect that they are plagiarizing each other in order to fight for scholarships. According to the theoretical knowledge in their report, it is completely possible to make a moonlight bomb.

The disabled girl, Xu Nian, was the only student who had submitted two bomb-making techniques.

Xu Nian lost his legs in a car accident when he was a child and relied on a wheelchair to get around. There are not many students with disabilities in universities, but few are in wheelchairs. Many students know Xu Nian, and their impression of her is: simple, innocent, versatile, good at painting and music.

Xu Nian's dormitory director reported to the police that once, the teacher took students from the school's painting club to sketch and draw horses on a hillside. That season was the estrus period of the horse, and a long and thick thing was erected under the horse's crotch, and all the girls who painted crossed the stick of the horse, deliberately not drawing, only Xu Nian drew the whole horse completely, and that thing was also painted vividly. When the teacher checked, other students accused Xu Nian and said: You little girl is so erotic.

The analysis of the special case team believes: Xu Nian is very suspicious!

The female principal denied this point of view, and she said to the special case team: If you want to investigate who is not suspected of committing a crime in this school, then it must be Xu Nian. How could this innocent girl go to kill someone? Besides, the counselor's residence is on the third floor, and it is impossible for Xu Nian to go to the counselor's dormitory in a wheelchair, let alone do anything to the sanitary napkin that the counselor puts on the bedside table.

Bao asked: How do you know that the counselor put the sanitary napkin in the bedside table?